Archives

Crane Boom

Can someone plzzz help???

A 63.9 kg carpenter at a construction site plans to swing in a circular arc from one roof top to an adjacent roof at the end of a 10.5 meter rope suspended from a crane boom. If her wiry arms, toughened by years of driving spikes with a No. 22 framing hammer, are capable of exerting 1142 N of force on the rope, what is the maximum speed that she can tolerate at the low point of her swing?

Her arm strength equals the maximum tension she can produce in the rope. This maximum tension must support both her weight and the centripetal force she is experiencing.

What is pulling her down?
1. Weight : Constant
2. Centripetal force: varies with velocity

LEt us see how much is the constant part: her weight:
Weight = mass x accelertion due to gravity = m *g
m = 63.9 kg
g = 9.8 m/s^2

Hence weight = m*g = 63.9*9.8 = 626.22 Newtons

So the total force (tension) that she can take up is 1142 N. So the maximum force due to centripetal force = 1142 - 626.22 = 517.78 N

WE know centripetal force = v^2 * r
v = velocity and r = radius
we know r = 10.5m
therefore 517.78 = v^2 * 10.5
v^2 = 517.78/10.5 = 49.1219048
v = sqrt(49.1219048) = 7.0087 m/s

So the maximum velocity she can tolerate is 7.0087 m/s

Find Crane Boom On eBay Below:

N Scale Union Pacific 4 Car Lot Crane  Boom Car Caboose  Container Car
N Scale Union Pacific 4 Car Lot Crane Boom Car Caboose Container Car
$36.00
Bachmann Union Pacfic Crane Car and Boom Tender N Scale Railroad Train Cars MIP
Bachmann Union Pacfic Crane Car and Boom Tender N Scale Railroad Train Cars MIP
$44.99
N Scale AHM Pennsylvania Crane and Boom Tender
N Scale AHM Pennsylvania Crane and Boom Tender
$9.99
BACHMANN N SCALE 46611 UNION PACIFIC CRANE CAR  BOOM TENDER
BACHMANN N SCALE 46611 UNION PACIFIC CRANE CAR BOOM TENDER
$15.00
box only N Scale Bachmann 46612 AT Santa Fe 250 Ton Crane  Boom Tender box only
box only N Scale Bachmann 46612 AT Santa Fe 250 Ton Crane Boom Tender box only
$12.00
Vintage Minitrix N Scale DB Yellow Boom Crane 3160
Vintage Minitrix N Scale DB Yellow Boom Crane 3160
$13.88
Bachmann Crane  Boom 46619
Bachmann Crane Boom 46619
$50.00
N Scale Bachmann Santa Fe Crane  Boom Operating Train Cars
N Scale Bachmann Santa Fe Crane Boom Operating Train Cars
$28.99
N Scale KW Tri Axle Truck with Heavy Boom Crane Kit Showcase Miniatures 65
N Scale KW Tri Axle Truck with Heavy Boom Crane Kit Showcase Miniatures 65
$24.95
BACHMANN N SCALE UNION PACIFIC CRANE  BOOM CAR 46611
BACHMANN N SCALE UNION PACIFIC CRANE BOOM CAR 46611
$30.00
N scale Bachmann  46611 CRANE CAR  BOOM TENDER Union Pacific New in Box
N scale Bachmann 46611 CRANE CAR BOOM TENDER Union Pacific New in Box
$22.50
Tichy N Scale Wreck Train Crane Boom Crew Kit 2704 Bob The Train Guy
Tichy N Scale Wreck Train Crane Boom Crew Kit 2704 Bob The Train Guy
$28.00
JL Innovative 2010 N Crane Boom Brass Kit 2 x
JL Innovative 2010 N Crane Boom Brass Kit 2 x
$10.22
N Scale Tomytec 13 Yellow Crane Boom w Hooks 1 150
N Scale Tomytec 13 Yellow Crane Boom w Hooks 1 150
$35.00
Railway Express Miniatures 2010 N Etched Brass Crane Boom 2
Railway Express Miniatures 2010 N Etched Brass Crane Boom 2
$8.28
Bachmann Crane Car  Boom Tender UP 46611 N scale 7C
Bachmann Crane Car Boom Tender UP 46611 N scale 7C
$24.50
N Scale Santa Fe ATSF Crane  Boom w MOW work car Flatcar ROCO Model Power NEW
N Scale Santa Fe ATSF Crane Boom w MOW work car Flatcar ROCO Model Power NEW
$28.55
N Scale lots 1 Bachman 56 1210 05 AMTRAK Crane Car  Boom Tender MOW Set AMT 18
N Scale lots 1 Bachman 56 1210 05 AMTRAK Crane Car Boom Tender MOW Set AMT 18
$29.99
N SCALE IDLER BOOM CAR FOR BROWNHOIST CRANE Kit 2701 TICHY TRAIN
N SCALE IDLER BOOM CAR FOR BROWNHOIST CRANE Kit 2701 TICHY TRAIN
$8.45
W 6 Bachmann Silver Series N Scale 46612 Operating Crane Car  Boom ATSF 199774
W 6 Bachmann Silver Series N Scale 46612 Operating Crane Car Boom ATSF 199774
$14.95
Bachmann 46619 N Scale Crane Car and Boom 250 Ton Crane  Boom Tender
Bachmann 46619 N Scale Crane Car and Boom 250 Ton Crane Boom Tender
$25.99
N Scale lots 1 Bachman 56 1210 05 AMTRAK Crane Car  Boom Tender MOW Set AMT 18
N Scale lots 1 Bachman 56 1210 05 AMTRAK Crane Car Boom Tender MOW Set AMT 18
$25.00
BACHMANN N GAUGE CRANE CAR  BOOM TENDER
BACHMANN N GAUGE CRANE CAR BOOM TENDER
$38.80
ARNOLD RAPIDO M A N BW371 WRECK CRANE AND BOOM 0465 N SCALE
ARNOLD RAPIDO M A N BW371 WRECK CRANE AND BOOM 0465 N SCALE
$27.71
Bachmann 46611 N Scale up Union Pacific Steam Crane and Boom Car
Bachmann 46611 N Scale up Union Pacific Steam Crane and Boom Car
$25.99


Recently Purchased Crane Boom:


bachmann n gauge crane car amp; boom tender, bachmann n scale 46611 union pacific crane car amp; boom tender, n scale lots 1bachman 56121005 amtrak crane car amp; boom tender mow setamt18, bachmann 46619 n scale crane car and boom 250ton crane amp; boom tender, w6 bachmann silver series n scale 46612 operating crane car amp; boom atsf 199774, n scale union pacific 4 car lotcrane amp; boom car caboose amp; container car , n scale ahm pennsylvania crane and boom tender, n scale santa fe atsf crane amp; boom w mow work car flatcar roco model power new, n scale tomytec 13 yellow crane boom w hooks 1150, n scale bachmann 46611 crane car amp; boom tender union pacific new in box, n scale bachmann santa fe crane amp; boom operating train cars, vintage minitrix n scale db yellow boom crane 3160, bachmann union pacfic crane car and boom tender n scale railroad train cars mip, arnold rapido man bw371 wreck crane and boom 0465 n scale, bachmann 46611 n scale up union pacific steam crane and boom car, bachmann crane car amp; boom tender up 46611 n scale 7c, railway express miniatures 2010 n etched brass crane boom 2, tichy n scale wreck train crane boom crew kit 2704 bob the train guy, bachmann n scale union pacific crane amp; boom car 46611, bachmann crane amp; boom 46619, n scale idlerboom car for brownhoist crane kit 2701 tichy train, box only n scale bachmann 46612 at santa fe 250 ton crane amp; boom tender box only, jl innovative 2010 n crane boom brass kit 2 x, n scale kw triaxle truck with heavy boom crane kit showcase miniatures 65



Comments are closed.